Consequences of screening in abdominal aortic aneurysm: development and dimensionality of a questionnaire

Journal of Patient-Reported Outcomes

Table 5 Summary of result from the psychometric analyses of part 2 of the COS-AAA

The items of part II of the COS-AAA in order of the scales (the item number indicates the order of appearance in the questionnaire)	Subscales and misfit	Observed	Expected	Gamma sd	Probability of fit to the Rasch model
1. broader aspects of life	Existential values	0.821	0.864	0.031	0.15680
2. enjoyment of life	Existential values	0.913	0.863	0.037	0.17767
8. thought about future	Existential values	0.860	0.860	0.036	0.99225
9. well-being	Existential values	0.886	0.861	0.034	0.46631
10. awareness of life	Existential values	0.840	0.859	0.038	0.62198
11. value life	Existential values	0.852	0.864	0.031	0.70760
3. relaxed	Relaxed/calm	0.842	0.859	0.040	0.65712
7. calm	Relaxed/calm	0.875	0.854	0.036	0.56099
15. relieved	Relaxed/calm	0.844	0.857	0.035	0.70844
4. family	Social relations	0.987	0.986	0.009	0.92118
5. friends	Social relations	0.996	0.984	0.010	0.27472
6. other people	Social relations	0.958	0.984	0.012	0.02807^a
12. energy	Impulsivity	0.848	0.903	0.030	0.06633
14. lived life to the full	Impulsivity	0.933	0.897	0.039	0.36525
17. being impulsive	Impulsivity	0.913	0.897	0.038	0.68946
19. desire to venture into something new	Impulsivity	0.922	0.905	0.028	0.54384
20. desire to venture into something risky	Impulsivity	0.926	0.910	0.026	0.53982
21. done some things that overstepped one’s bounds	Impulsivity	0.882	0.901	0.034	0.56734
13. responsibility for one’s family	Empathy	0.691	0.752	0.067	0.36721
16. understand other people’s problems	Empathy	0.873	0.889	0.031	0.60584
18. ability to listen to other people’s problems	Empathy	0.896	0.870	0.033	0.42455

^aAdjusting the p-values in the table in order to control the false discovery rate and so avoid spurious significant results due to multiple testing suggested that this result should be regarded as not significant [38]